Airline pump



S. L. BROWN April 23, 1929.

AIRLINE PUMP Filed Nov. 3, 192 4 Sheets-Sheet In ventor A ril 23, 1929. s, L, BROWN 1,710,402

AIRLINE PUMF Filed Nov. 5, 192'? 4 Sheets-Sheet 2 5: .Z. (Eran/r7 Attomg Invemar April 23, 1929. s, L, BRO 1,710,402

AIRLINE PUMP Filed Nov. 5, 1927 4 Sheets-Sheet 3 Patented 23, 192559,

simm- L. nnowN, or FRANKLIN, PENNSYLVANIA.

AIRLINE PUMP.

Application filed November The present invention relates to an air-line um) and is designed for the )UI'JOSG of p l o 7 l y me 1,

J feeding air to an airline for driving various ieuniatic hammers and mechanisms such as the like. g 7

An object of the invention resides in the provision of strrcture wherein the air is compressed and dri en through a cooler and then further compressed and forced into air line, the stru e-being of such a nature that the temp of the air is maintained relatively low.

A further important object oi? the invention resides the provision of a structure of this nature which th' 'cughly etficient and reliable in operation andwell adapted to the purpose for which it is designed.

WVith the above and 11111119330113 other ob jccts in view as will appearas the description proceeds, the invention resides certain novelfeatures of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing: I Figure 1 is a longitudinal vertical section. lirough the structure embodying the features of my invention, L

Figure 2 is a transverse vertical sect on taken substantially on the line 22 of Fig- Figure 3 is a longitudinal "section through the piston taken at right angles to that shown in Figure 1,

Figure at is a longitudinal section through the pistons as disposed in Figure 1. V

Figure 5 is a longitudinal section through the outer piston structure, 7 c

Figure 6 is a longitudinal section through the inner piston structure,' I v Figure 7 is a sectional view through one of the cylinder heads Figure 8 is a longitudinal section through the other cylinder head, and

Figure 9 is an end elevation of the inner piston.

Referring to the drawing in detail it will be seen that the numeral 5 denotes a cylinder, the wall of which is hollow and formed with an annular central passage 6 which leads into the cylinder ports '7. An entrance 8 is provided in the cylinder to the passage 6. On one side of the cylinder 5 there is formed a longitudinal passage 9 with a central outlet 10 and end intakes l1.

Plates 12 are positioned at the ends of the from a, 1927. Serial No. 230,782.

cylinder 5 and are formed with openings 13 concentric inrespect to thebore of the cylinder and of less diameter. than the bore. Upenings 14- are formed in the plates in regi, ry with openings 11. Cylinder heads 15 and 15 are positioned, one adjacent each plate 12, and are formed with inner annular.

passages '16 from which lead openings 17 in registry with openings 14 and to which lead annular slots 18 from the bore of the cyl1nder. These cylinder ends areifurthcr provided with annular passages 19 having openings 20 and openings 21. A head 22 is torn'ied with the hollow plate on having openings 23 and 24. The openings ister with the openings 21 or one I inder'cnd l5. Theopening24l is contrally located in the inner wall of the platen and a hollow cylindrical member oprojocts from the outer wall through the opening 2%- and has a longitudinal channel 26 partly covered by a wall 0. Pipes 27 and 28 lead from openings 20 to a cooler 29 of any preferred construction. Ahead 30 is positioned against the cylinder end 15 and comprises a hollow plate a having openings 31 registering with openings 21 of the cylinder end 15, having openings 32 communicating with the bore of the cylinder end 15 and formed with a cylindrical member I) provided with slideways 34 and opening 33 for water.

A piston structure P is slidable in the low wali having an outlet port 39 opening into the cylinder The hollow wall of the cylinder 35 is -further provided with passages 40 and 41 terminating in outlets 42 and 13 respectively torregistry with slots 18 oi? the cylinder ends 15 and 15 respectively; said passages 40 and 41 also terininating in intakes 44 and 45 opening interiorly oi the cylinder 36. Piston heads 46 are formed on the cylinder 36 one to each side of the center thereof. These piston heads 46 are slidable in the bore of the cylinder 5 between the plates 12, while the cylinder 36 is slidable in the bores of the cylinder ends and 15'. 72 extend into the or The members F) and .ds of the cylinder 36 inder 36 oil" the walls of the cylinder 86 are solid and provided. with orifices t7 and The piston P hollow and ha ports 49 one to each side of its center. Exterior circunrferential channels 50 are formed on the piston lf, the ports 49 being between the channels. Passages re formed in the wall of the piston if leading from points just outside oi? the channel; 50 to the opposite end of the piston P.

Any suitable means is provided for reciprocating the pis-;tons l and P one a little in advance of the other. In the present instance this motion is accomplished by means of rods 53 extending from cross heads 55%; and engaged Hire-ugh one end with the c'yl the piston l A rod 55 extends through op ning 3d; and is engaged with the piston l" one end and at opposite end with across head 56, :ross heads are mounted in suitable slide/ways and operable by means of connecting rods 58 end with cranks 59 slightly offset in re- .lhese cranl zs 59 are spect to each other. on a shaft (30. Thus by the turning oi the shaft 60 the cranks through the mechanism just described reciprocate the pistons l? and P ack and forth one a little lllfKlVilfiCC of the other ec use of the offset relation of the cranks 59.

It is thought that the details of construc tion have been sufficiently described to Cl;- able one skilled in the art to tollow the air through the apparatus when in operation.

Starting with the parts in the position shown in Figure l and presuming that the shaft 60 is rotating in a cloclnvise direction it will be seen tl the space between p' :ton heads l6 within the cylinder 5 open to the atmosphere through the entrance 8, and openings 7. This air also tree to llow through orifice l? and a port regiserin therewith through the piston l out through the other port l9 which is in registhe right hand orifice 48 around the channel 50 through the port 37, through the passage 36, opening 39 through the hollow plate a 01" the head 22 through the opening 23 through the compartment 190i the cylinder end 15 through the pipe 27 througl'r the cooler 29, through the pipe 28 into the com-- partment 19 of the head '30 into the plate a into the passage 40 port 8'? registering with passage 5i to the right causing the air to flow into the right hand end of the cylinder '36 t be compressed between the piston '19 and the inner end of the member 5 oi the held 30 and to be iorcedout through openiu 42 into the right hand cylinder end compartment 16 and into the line 10. This action '18 continuous as the cylinders reciprocate bacl: and to end l'llOl" that the air on the h hand side ot the app without a detailed description It is thought that the c nstruction, operation, utility and advantages oi this invention will now be clearly understood by those led :in'this without a more detailed description The present enibediment'oi the on has been discloscd'i'n detail merely by way of example since in actual pracis tire feature of advantage enuii'wention and the above description. lit will be apparent that changes in the details of constructiom and in the combination and arrangement of parts may be resorted to without departing fronrthe spirit or scope of the invention as hereinafter claimed or sacrificing any of itsadvantages. v V 7 Having thus'described my inventiom what I claim as new is:

An apparatus of the class described comprising a cylinder formed with an intake passage and an outlet passage, a piston slid? able in the cylinder and having a cylinder portion with a pair 01" heads one spaced to each side of the center of the cylinder portion, the space between the heads being in coin inunication with the intake passage, a second piston slidable in the cylinder portion, said cylinder portion having a plurality of longitudinal passages for leading the air from the cylinder by the movement of the heads therein to a by-pass and passages to eceive the air from the by-pass to. lead the air into the cylinder portion to be acted upon by the second piston and forced into the outlet passage.

In testimony whereof I affix my signature.

STEPHEN L. B'RQWN.

out through passage ll.

atus may be followed desirable in the statement of the 

